Update on single-screw expander geometry model integrated into an open-source simulation tool

9th International Conference on Compressors and their Systems

Ziviani, D.^1 ; Bell, I.H.^2 ; De Paepe, M.^1 ; Van Den Broek, M.^1

Department of Flow Heat and Combustion Mechanics, Ghent University - UGent, Sint-Pietersnieuwstraat 41, Gent

9000, Belgium^1

Aerospace and Mechanical Engineering Department, University of Liège, Campus du Sart Tilman B49, Liège

B-4000, Belgium^2

关键词: Geometric description;    Main parameters;    Organic Rankine cycles;    Positive displacement;    PYTHON language;    Solution algorithms;    Steady-state measurements;    Steady-state modeling;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/90/1/012064/pdf
DOI  :  10.1088/1757-899X/90/1/012064

来源: IOP

【 摘 要 】

In this paper, a mechanistic steady-state model of a single-screw expander is described with emphasis on the geometric description. Insights into the calculation of the main parameters and the definition of the groove profile are provided. Additionally, the adopted chamber model is discussed. The model has been implemented by means of the open-source software PDSim (Positive Displacement SIMulation), written in the Python language, and the solution algorithm is described. The single-screw expander model is validated with a set of steady-state measurement points collected from a 11 kWe organic Rankine cycle test-rig with SES36 and R245fa as working fluid. The overall performance and behavior of the expander are also further analyzed.